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The InterFeron Induced TransMembrane (IFITM) proteins are interferon stimulated genes that restrict many viruses, including HIV-1. SAMHD1 is another restriction factor blocking replication of HIV-1 and other viruses. Some lentiviruses evolved Vpx/Vpr proteins to degrade SAMHD1. However, this viral antagonism can be perturbed by host mechanisms: a recent study showed that in interferon (IFN) treated...
The primate APOBEC3 gene locus encodes a family of proteins (APOBEC3A-H) with various antiviral and antiretroelement activities. Here, we trace the evolution of APOBEC3H activity in hominoids to identify a human-specific loss of APOBEC3H antiviral activity. Reconstruction of the predicted ancestral human APOBEC3H protein shows that human ancestors encoded a stable form of this protein with potent...
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